STUDY OF THE COMPOSITION OF ORGANIC ACIDS IN THE LEAVES OF THE SEA BUCKTHORN OF THE CIR-CULAR (HIPPOPHAE RHAMNOIDES L.)

Abstract

Sea buckthorn (Hippophae rhamnoides L.) is a promising medicinal plant for harvesting not only fruits, but also leaves as a medicinal plant raw material (MPRМ). Leaf extracts have antioxidant, anti-inflammatory, antibacterial, antiviral, adaptogenic and immunostimulatory properties due to the complex of biologically active substances (BAS) (tannins, organic acids and flavonoids), which confirms their value as MPRM for the development of herbal medicines (HMP) on their basis. The aim of the work was to study the composition of organic acids (including amino acids) of sea buckthorn leaves of various phenological phases of the harvest. The object of the study is the dried leaves of sea buckthorn of three phenological phases of plant life (I – the phase of fruit set, II – the phase of single fruit ripening, III – the phase of mass ripening of fruits) collected on the territory of the Voronezh region and dried leaves of sea buckthorn in 2021. The objectives of the study included a comprehensive study of the composition of the fraction of organic acids in leaves (free and bound) using the methods of chemical and physicochemical analysis. The data obtained showed that, in general, the qualitative composition of the BAS of the group of acids of the studied leaf phenophases is similar to each other, but differs quantitatively. For the harvesting of this medicinal product on an industrial scale, from the point of view of the content of the total organic acids, the harvesting phase can be recommended, since early deleafing can lead to a decrease in the accumulation of valuable BAS groups in fruits – the source of the pharmacopoeial preparation «Oil of Hippophaës».